EP1393017B1 - Festkörperlaserkreisel welcher einen resonatorblock enthält - Google Patents

Festkörperlaserkreisel welcher einen resonatorblock enthält Download PDF

Info

Publication number
EP1393017B1
EP1393017B1 EP02740835A EP02740835A EP1393017B1 EP 1393017 B1 EP1393017 B1 EP 1393017B1 EP 02740835 A EP02740835 A EP 02740835A EP 02740835 A EP02740835 A EP 02740835A EP 1393017 B1 EP1393017 B1 EP 1393017B1
Authority
EP
European Patent Office
Prior art keywords
solid
state laser
gain
medium
block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02740835A
Other languages
English (en)
French (fr)
Other versions
EP1393017A1 (de
Inventor
J. c/oThales Intellectual Property POCHOLLE
P. c/o Thales Intellectual Property GALLON
J. c/o Thales Intellectual Property LECLERC
H. c/o Thales Intellectual Property GIRAULT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Thales SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thales SA filed Critical Thales SA
Publication of EP1393017A1 publication Critical patent/EP1393017A1/de
Application granted granted Critical
Publication of EP1393017B1 publication Critical patent/EP1393017B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58—Turn-sensitive devices without moving masses
    • G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/66—Ring laser gyrometers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/0602—Crystal lasers or glass lasers
    • H01S3/0604—Crystal lasers or glass lasers in the form of a plate or disc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
    • H01S3/083—Ring lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
    • H01S5/1071—Ring-lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
    • H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
    • H01S5/183—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]

Definitions

  • the present invention relates to a solid state laser gyro having a resonator block.
  • Monolithic gyrometers are known, for example according to the patent US 5,960,022 using as a laser source a solid medium.
  • This patent describes a gyrometer in which the resonant cavity is made of a fully doped optical material, which makes it difficult to achieve if it is desired that it has homogeneous qualities.
  • this type of laser uses a non-negligible volume of doped materials, which makes it expensive and has drifts as a function of ambient temperature variations.
  • the present invention relates to a solid state laser gyroscope that is easy to perform, inexpensive, using a small volume of active material, and is temperature stable.
  • the laser gyro comprises a planar solid state resonator block in which is defined an optical path followed by two contra-rotating waves generated by an optical gain laser medium, characterized in that the resonator block is made of a passive material undoped and that the gain medium is directly attached to a side face of the resonator block.
  • this block comprises machined optical channels.
  • the gain medium is a rare earth doped crystal pumped by laser diode. Alternatively, this gain medium can be pumped directly electrically.
  • the laser gyro device exploits the rare earth laser emission properties when they are inserted into a host matrix defining an optical cavity and are excited by an optical pumping process.
  • L is the length of the perimeter of the cavity
  • C is the speed of light in the medium present in the cavity
  • m is the integer number of wavelengths ⁇ m contained in a cavity perimeter, m being such that :
  • the ⁇ m m
  • the cavity is animated with a rotation movement of angular velocity ⁇ around an axis perpendicular to the main plane of the cavity and passing through its center, the co-propagative and contra-propagative waves (turning in the same direction as the cavity) and in the opposite direction, respectively) undergo the Sagnac effect.
  • This effect is equivalent to a change in the distance traveled by the two waves (increased distance of ⁇ L for the co-propagating wave and decreased ⁇ L in the other direction).
  • This effect is accompanied by a modification of the pulsations associated with the waves according to their direction of propagation in the cavity (increase of the pulsation ⁇ m - in the opposite direction to that of the rotation of the cavity, - and decrease of the pulsation ⁇ m + in the direction of rotation).
  • ⁇ m - - ⁇ m + 2 ⁇ ⁇ m .delta.L /
  • the S being the area circumscribed by the ring that forms the cavity and L being the length of this ring.
  • FIG 1 the schematic diagram of a laser gyroscope 1 made entirely of solid state components.
  • the cavity 2 is planar and of rectangular annular shape. It is made in an optical block 3 in the form of a rectangular plate of small thickness (a few millimeters for example), while the other dimensions of the block are much larger (of the order of 10 cm or more for example). vertices of the rectangle formed by the cavity coincide with the centers of the lateral faces of the block.
  • the fourth vertex 2D comprises a block 4 made of material doped with rare earths with optical gain, directly fixed on the face corresponding side of the block 3, and associated with a solid state component optical pumping device 5 also.
  • FIG 2 the schematic diagram of an embodiment variant 6 of the gyrometer of the figure 1 .
  • This gyrometer 6 is made from a block 7 of optical material, whose thickness is also small compared to its other dimensions.
  • This block has a rectangular parallelepiped shape whose four side corners are removed.
  • Two of the opposite surfaces 7A, 7B thus created remain bare, while the other two surfaces 7C and 7D are provided with blocks 8 and 9 made of semiconductor material or of the rare earth-doped dielectric crystal forming an active medium with optical gain.
  • An annular optical cavity 10 is formed between the successive centers of the surfaces 7A, 7C, 7B and 7D. We thus obtain a structure symmetrical (with respect to the diagonals joining the centers of surfaces 7A, 7B and 7C, 7D).
  • Pumping devices 11 and 12 are associated with the blocks 8 and 9 respectively. These devices 11 and 12 are arranged symmetrically with respect to the diagonal connecting the media of the surfaces 7A, 78, so as to attack the optical paths starting from these centers in opposite directions.
  • FIG 3 An embodiment of a laser gyrometer embodying the principle of figure 1 .
  • This gyrometer 13 is made from a block 14 made of material with a very low coefficient of thermal expansion, for example “ZERODUR (TM) ".
  • ZRODUR TM
  • four fine channels 15 to 18 are made, respectively joining the centers of the consecutive lateral faces 19 to 22 of this block. These channels have for example a cylindrical section with a diameter of about 1 mm.
  • the mirrors 23 to 25 are fixed, and on the center of the face 22, an "active mirror” 26 is fixed, which is constituted by one or more plates of solid laser material, for example from Nd 3+ : YVO 4 .
  • This wafer (or set of wafers) has on its face opposite to that which is applied against the block 14 a mirror having a maximum reflection coefficient at the wavelength of oscillation in the ring cavity (constituted by the segments 15 to 18) and for the angle of incidence on this mirror imposed by the geometry of this ring.
  • the plate 26 On its face applied against the block 14, the plate 26 has an antireflection treatment.
  • This wafer 26 is associated with a pumping device 27.
  • the channels 15 to 18 may be filled with a neutral gas at a pressure which is a function of the field of use of the gyrometer (atmospheric pressure or different). This gas may be purified air or nitrogen, for example. The only criterion for choosing this gas (or mixture of neutral gases) is the absence of absorption band at the working wavelength.
  • the invention also applies to the realization of a tri-axis gyroscopic system, by associating three devices as described above and whose planes are perpendicular to each other, two by two.
  • the spatial filtering or the transverse laser mode selection can be performed by modifying in a manner known per se, the diameter of the channels 15 to 18 and / or the characteristics of the optical pumping system 27.
  • the laser material of the wafer (or wafers) 26 is preferably a uniaxial crystal of yttrium vanadate doped with the rare earth ion Vd 3+ .
  • a Nd: YAG crystal at the wavelength of oscillation of 1.064 nm can also be used to make the microplates 26.
  • this crystal can be doped with 1.1 atomic% Nd 3+ , which makes it possible to obtain a high optical gain coefficient for a small crystal thickness.
  • the absorption coefficient is then 6 cm -1 , which gives a thickness of Nd: YAG of about 1.5 mm.
  • Yb Er glass plate
  • the pump 28 (one or more laser diodes) drives a single multimode optical fiber 29 which leads to the mirror portion 26A of the wafer 26.
  • the device 30 for optically pumping the wafer 26 comprises two optical fibers 31 and 32 coupled through convergent lenses 33 and 34 respectively, to this wafer 26.
  • the output-axes 31 A. 32A of the fibers 31, 32 are oriented so as to converge at a point such that maximum optical energy is injected into the channels leading to the wafer 26 (channels 17 and 18 of the figure 3 ).
  • the overlap integral between the cavity mode and the spatial distribution of the pumping energy i.e. gain
  • This device 30 also makes it possible to provide spatial filtering of the cavity mode when the latter oscillates, thanks to this optimization of the overlapping integrals.
  • each channel (forming part of the channels referenced 10 in figure 2 ) has a length (optical) of 10 cm, the mirrors formed at the four corners of optical block 7 having a radius of curvature of 1 m.
  • the dimensions of the Gaussian beam associated with the TEM 00 fundamental mode in such a resonator are respectively 247.8 ⁇ m in the plane of the resonator and 297 ⁇ m in the plane perpendicular to the first. These quantities correspond to the radius of the neck of said fundamental mode ("waist" in English).
  • the dimensions of the mode radius are respectively 257 and 303 ⁇ m.
  • the example of figure 6 refers to a crystal block (such as block 14 of the figure 3 ) in Nd: YVO 4 with a thickness of 500 ⁇ m coated with a Rmax treatment (ensuring maximum reflection at the laser wavelength of the work) on one of its large faces and an anti-reflection treatment on the other large face, and this for a 45 ° incidence of the laser beam.
  • the Rmax treatment (for a wavelength of 1.064 ⁇ m) must also be adapted so that the pump beam (at 0.808 ⁇ m in the present example) can be effectively coupled to the active medium (micro-wafer 26 in figure 3 ).
  • the evolution of the threshold incident pumping power can be evaluated as a function of the reflection coefficient of the output mirror (mirror 24). We admit that losses on the optical path (losses at the relay mirrors.Rmax 23 and 25 and diffraction losses) are 0.5%.
  • the network of curves of the figure 6 represents the variation of the laser power emitted in Watts (laser oscillation) as a function of the pumping power (also in Watts) and the reflection coefficient of the output mirror, the length of the cavity ring being 40 cm ( four successive channels each 10 cm long).
  • the figure 7 refers to a structure similar to that relating to the figure 6 , the only difference being that the Nd: YVO crystal 4 has a thickness of 1 mm.
  • the pumping optical power to be used can be minimized.
  • the advantage of the device of the invention for the laser gyro lies in the fact that the supply of a pump laser diode requires an electrical voltage which is of the order of magnitude of the forbidden band energy of the semiconductor compound. employee. Typically, at the wavelength of 0.8 ⁇ m, this voltage is about 1.5 V. Only the injection of current into the laser diode regulates the level of optical power delivered. The optical / electrical conversion efficiency is typically about 50%. Thus, if the level of pump power needed to maintain the laser oscillation is 500 mW, the electrical power consumed is about 1 W.
  • a single pumping laser diode it can be coupled directly (by physical contact) or by means of a "cylindrical lens" (semi-cylindrical) type micro-optics allowing to correct the divergence of the pump beam emitted in a direction perpendicular to the junction.
  • the diffusion effects at the mirrors are reduced if this diffusion is governed by a Rayleigh process, which, however, leads to reduction of the phenomenon of phase accumulation in an interferometric assembly.
  • FIG. 8 the schematic diagram of a gyrometer structure 36 whose ring cavity has a triangular shape.
  • the optical block 37 in which the optical cavity is formed is an optical plate having an isosceles or equilateral triangle shape whose three vertices have been removed in such a way that the small lateral surfaces 38, 39 and 40 thus released are perpendicular to the bisectors. angles of the triangle.
  • Three channels 41, 42 and 43 are drilled in this block to form the cavity, these channels respectively joining the centers of the surfaces 38 to 40.
  • a plate of active medium such as FIG. plate 26
  • Each of these two plates is associated with a pump laser diode, 46, 47 respectively.
  • a semi-VCSEL laser diode may be used in which the external Bragg mirror is replaced by anti-glare treatment. In this case, this component acts as a gain zone, and the resonator imposes the spatial and frequency filtering conditions.
  • the device of the invention makes it possible to reduce the cost of a laser gyroscope and considerably simplify the design and manufacture thereof.
  • the sensitivity gain associated with the use of a short wavelength makes it possible to produce all-solid optical state gyrometers. If materials and structures whose gain curve is adapted to the wavelength of the He-Ne gas laser operating at a wavelength of 0.6328 ⁇ m are used, the technologies used to the mirrors of the cavities.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Lasers (AREA)
  • Gyroscopes (AREA)

Claims (10)

  1. Festkörperlaser-Gyrometer, der einen ebenen Festkörper-Resonatorblock (3, 7, 14, 37) umfasst, in dem ein Lichtweg (2, 10, 15 bis 18, 41 bis 43) definiert ist, gefolgt von zwei gegenläufigen Wellen, die von einem optisch verstärkten Lasermedium (4, 8-9, 26, 46-47) erzeugt werden, dadurch gekennzeichnet, dass der Resonatorblock aus einem nichtdotierten passiven Material besteht, und dadurch, dass das verstärkte Medium (4, 8, 9, 26, 44, 45) direkt an einer lateralen Fläche des Resonatorblocks befestigt ist.
  2. Festkörperlaser-Gyrometer nach Anspruch 1, dadurch gekennzeichnet, dass der Resonatorblock ein Block aus passivem Material ist, in den Kanäle eingearbeitet sind.
  3. Festkörperlaser-Gyrometer nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das verstärkte Medium ein vorzugsweise polarisiert emittierendes Material beinhaltet, das von einer Laserquelle (5, 11-12, 28, 46-47) gepumpt wird.
  4. Festkörperlaser-Gyrometer nach Anspruch 3, dadurch gekennzeichnet, dass das verstärkte Medium ein mit seltenen Erden dotierter Kristall ist.
  5. Festkörperlaser-Gyrometer nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass das verstärkte Medium ein Halbleiter ist, der direkt auf elektrischem Weg gepumpt wird.
  6. Festkörperlaser-Gyrometer nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass das verstärkte Medium ein einachsiger Yttriumvanadat-Kristall ist, der mit dem Seltenerdion Nd3+ dotiert ist.
  7. Festkörperlaser-Gyrometer nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das verstärkte Medium Nd:YAG ist.
  8. Festkörperlaser-Gyrometer nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Resonatorblock aus einem Material mit einem niedrigen Wärmeausdehnungskoeffizienten ist.
  9. Festkörperlaser-Gyrometer nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Resonatorblock aus "ZERODUR" ™ ist.
  10. Dreiachsiges gyroskopisches System, dadurch gekennzeichnet, dass es drei Gyrometer nach einem der vorherigen Ansprüche umfasst, wobei die Ebenen paarweise lotrecht zueinander sind.
EP02740835A 2001-05-30 2002-05-28 Festkörperlaserkreisel welcher einen resonatorblock enthält Expired - Lifetime EP1393017B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0107266A FR2825463B1 (fr) 2001-05-30 2001-05-30 Gyrometre laser etat solide comportant un bloc resonateur
FR0107266 2001-05-30
PCT/FR2002/001792 WO2002097370A1 (fr) 2001-05-30 2002-05-28 Gyrometre laser etat solide comportant un bloc resonateur

Publications (2)

Publication Number Publication Date
EP1393017A1 EP1393017A1 (de) 2004-03-03
EP1393017B1 true EP1393017B1 (de) 2010-10-20

Family

ID=8863915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02740835A Expired - Lifetime EP1393017B1 (de) 2001-05-30 2002-05-28 Festkörperlaserkreisel welcher einen resonatorblock enthält

Country Status (5)

Country Link
US (1) US20040202222A1 (de)
EP (1) EP1393017B1 (de)
DE (1) DE60238051D1 (de)
FR (1) FR2825463B1 (de)
WO (1) WO2002097370A1 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2853061B1 (fr) * 2003-03-25 2006-01-20 Thales Sa Gyrolaser a etat solide stabilise
FR2854947B1 (fr) * 2003-05-16 2005-07-01 Thales Sa Gyrolaser a etat solide stabilise par des dispositifs acousto-optiques
JP2005249547A (ja) * 2004-03-03 2005-09-15 Advanced Telecommunication Research Institute International 半導体レーザジャイロ
FR2876447B1 (fr) 2004-03-16 2007-11-02 Thales Sa Gyrolaser a etat solide stabilise a quatre modes sans zone aveugle
FR2876448B1 (fr) * 2004-03-16 2007-11-02 Thales Sa Gyrolaser a etat solide stabilise sans zone aveugle
FR2876449B1 (fr) 2004-10-08 2006-12-29 Thales Sa Gyrolaser a etat solide a facteur d'echelle stabilise
FR2877775B1 (fr) * 2004-11-05 2008-06-06 Thales Sa Gyrolaser a milieu solide semi-conducteur a structure verticale
US7385177B2 (en) * 2005-01-05 2008-06-10 Ramot At Tel-Aviv University Ltd. Light guide rotation rate detector with coupled optical resonators
US7362443B2 (en) * 2005-11-17 2008-04-22 Honeywell International Inc. Optical gyro with free space resonator and method for sensing inertial rotation rate
FR2894663B1 (fr) * 2005-12-13 2008-02-08 Thales Sa Gyrolaser a etat solide active optiquement par biais alternatif
FR2894662B1 (fr) 2005-12-13 2008-01-25 Thales Sa Gyrolaser a etat solide a modes contre-propagatifs orthogonaux
JP2007271354A (ja) * 2006-03-30 2007-10-18 Advanced Telecommunication Research Institute International リングレーザジャイロ
FR2902870B1 (fr) * 2006-06-23 2008-09-05 Thales Sa Dispositif d'amelioration de la duree de vie d'un gyrometre triaxial
FR2905005B1 (fr) * 2006-08-18 2008-09-26 Thales Sa Gyrolaser a etat solide avec milieu a gain active mecaniquement.
FR2938641B1 (fr) * 2008-11-18 2010-11-26 Thales Sa Gyrolaser a etat solide a pompage optique controle
FR2959811B1 (fr) 2010-05-07 2013-03-01 Thales Sa Gyrolaser a etat solide multioscillateur stabilise passivement par un dispositif a cristal doubleur de frequence
US9207082B2 (en) 2012-08-15 2015-12-08 Honeywell International Inc. Fiber resonator gyroscope with low round trip loss and high output power
CN104489872B (zh) * 2014-12-30 2016-05-11 山西省农业科学院高寒区作物研究所 种子风干晾晒平台
US10148059B2 (en) * 2016-06-23 2018-12-04 Theodore John Podgorski Gain mirror for solid state ring laser rotation sensors
GB201709922D0 (en) * 2017-06-21 2017-08-02 Redwave Labs Ltd Optical device
US10739137B2 (en) * 2018-08-17 2020-08-11 Honeywell International Inc. Solid state ring laser gyroscope using rare-earth gain dopants in glassy hosts
US10907967B1 (en) * 2019-10-02 2021-02-02 Honeywell International Inc. Ring laser gyroscopes with active volume Bragg grating

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5241555A (en) * 1991-10-28 1993-08-31 Spitzer Mark B Semiconductor single crystal external ring resonator cavity laser and gyroscope

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618278B1 (fr) * 1987-07-17 1989-12-01 Thomson Csf Correlateur a fibre optique.
FR2618221B1 (fr) * 1987-07-17 1991-07-19 Thomson Csf Detecteur d'onde electromagnetique et analyseur d'image comportant un tel detecteur.
FR2619936B1 (fr) * 1987-09-01 1989-12-01 Thomson Csf Modulateur pour onde electromagnetique, a puits quantiques, et utilisation de ce modulateur comme polariseur
FR2640438B1 (fr) * 1988-12-09 1991-01-25 Thomson Csf Procede de realisation de lasers semi-conducteurs et lasers obtenus par le procede
GB8908304D0 (en) * 1989-04-12 1989-05-24 Secr Defence Ring laser
FR2647973B1 (fr) * 1989-05-30 1991-08-16 Thomson Csf Lasers de puissance pompes par diodes lasers
FR2648962B1 (fr) * 1989-06-23 1994-09-09 Thomson Csf Structure d'illumination d'un barreau laser, a sources optiques defocalisees
FR2649536B1 (fr) * 1989-07-04 1994-07-22 Thomson Csf Detecteur d'ondes electromagnetiques
FR2649548B1 (fr) * 1989-07-06 1994-08-26 Thomson Csf Laser solide a longueur d'onde d'emission 0,5-0,65 micrometres
FR2649833A1 (fr) * 1989-07-11 1991-01-18 Thomson Csf Source laser de puissance accordable
FR2652685B1 (fr) * 1989-10-03 1991-12-06 Thomson Csf Source laser de puissance a commande optique de balayage de faisceau.
FR2655461B1 (fr) * 1989-12-01 1992-11-27 Thomson Csf Source optique miniature et procede de realisation.
FR2660493A1 (fr) * 1990-03-30 1991-10-04 Thomson Csf Dispositif laser a changeur de frequence integre de facon monolithique.
US5367377A (en) * 1990-04-20 1994-11-22 Litton Systems, Inc. Solid state split-gain multioscillator ring laser gyroscope
FR2666699A1 (fr) * 1990-09-11 1992-03-13 Thomson Csf Laser a guides optiques couples.
FR2671237B1 (fr) * 1990-12-28 1995-03-31 Thomson Csf Laser solide de grande energie.
US5097477A (en) * 1991-05-07 1992-03-17 The United States Of America As Represented By The Secretary Of The Navy Laser diode pumped multiple rod ring laser allowing combination of multiple pump sources
FR2679050B1 (fr) * 1991-07-09 1994-08-26 Thomson Csf Dispositifs d'optique non lineaire.
FR2681737A1 (fr) * 1991-09-24 1993-03-26 Thomson Csf Source monofrequence de puissance a fibre optique.
FR2681738B1 (fr) * 1991-09-24 1993-11-05 Thomson Csf Lasers de puissance a filtre semiconducteur.
US5416583A (en) * 1993-07-30 1995-05-16 Kearfott Guidance & Navigation Corporation Quantum well bias mirror for phase modulation in a ring laser gyroscope
DE19504373C2 (de) * 1995-02-10 2000-06-15 Daimler Chrysler Ag Diodengepumpter Festkörper-Ringlaserkreisel
FR2787878B1 (fr) * 1998-12-23 2001-03-16 Sextant Avionique Suspension elastique antivibratoire pour unite de mesure inertielle
FR2796211B1 (fr) * 1999-07-09 2001-10-12 Thomson Csf Cavite optique instable pour faisceau laser
US6865213B2 (en) * 2001-03-07 2005-03-08 General Atomics Diode-pumped solid-state laser in a polyhedronal geometry
US6714580B2 (en) * 2001-12-05 2004-03-30 Honeywell International Inc. Current control biasing to protect electrode seals

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5241555A (en) * 1991-10-28 1993-08-31 Spitzer Mark B Semiconductor single crystal external ring resonator cavity laser and gyroscope

Also Published As

Publication number Publication date
WO2002097370A1 (fr) 2002-12-05
DE60238051D1 (de) 2010-12-02
US20040202222A1 (en) 2004-10-14
FR2825463B1 (fr) 2003-09-12
EP1393017A1 (de) 2004-03-03
FR2825463A1 (fr) 2002-12-06

Similar Documents

Publication Publication Date Title
EP1393017B1 (de) Festkörperlaserkreisel welcher einen resonatorblock enthält
EP2473885B1 (de) Vorrichtung für atomuhr
JPH025490A (ja) ソリッドステート・マイクロレーザー
EP3338330B1 (de) Terahertzlaser, terahertzquelle und verwendung solch eines terahertzlasers
EP2342535A1 (de) Laserkreisel mit einem festkörper-verstärkungsmedium und einem optischen ringresonator
EP1606584A1 (de) Stabilisierter festkörper-laserkreisel
FR2512198A1 (fr) Gyrometre laser triaxial, monobloc, compact a six miroirs
FR2500154A1 (fr) Procede et dispositif d'absorption d'ondes electromagnetiques reflechies dans un gyroscope a laser
Savchenkov et al. Crystalline waveguides for optical gyroscopes
EP0724315A1 (de) Mikorlaserkavität und ihr Herstellungsverfahren
FR2854947A1 (fr) Gyrolaser a etat solide stabilise par des dispositifs acousto-optiques
RU2381450C2 (ru) Лазерный гироскоп с твердотельной полупроводниковой средой вертикальной структуры
EP1397851B1 (de) Frequenzstabilisierte laserquelle
FR2863702A1 (fr) Gyrolaser a etat solide stabilise et a milieu laser anisotrope
FR2739195A1 (fr) Coupleur optique a bande etroite utilisant l'excitation des modes de galerie d'un element resonateur dielectrique de forme de revolution
JP2007271354A (ja) リングレーザジャイロ
EP1880451A1 (de) Optische pumpvorrichtung
JP2000205864A (ja) 光ジャイロ
EP1797413A1 (de) Optisches system mit strahlausbreitungserweiterung
EP0767519A1 (de) Vorrichtung zur optischen Verstärkung
WO2024115378A1 (fr) Systeme optique pour resonateur
FR3020900A1 (fr) Laser a etat solide faible bruit
Wan et al. Experimental research on the diode-pumped solid-state ring laser
FR2826192A1 (fr) Laser solide a cavite plan/plan et source laser stabilisee en frequence mettant en oeuvre ledit laser solide
FR2953654A1 (fr) Procede pour generer un faisceau coherent de lumiere par somme de frequence, dispositif et systeme associes.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20031014

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

17Q First examination report despatched

Effective date: 20090904

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 60238051

Country of ref document: DE

Date of ref document: 20101202

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20110721

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 60238051

Country of ref document: DE

Effective date: 20110721

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101020

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20130522

Year of fee payment: 12

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140528

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140528

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150519

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60238051

Country of ref document: DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161201

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20200505

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210531

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230427